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Is It OK to Change Oil But Not Filter?

The oil filter, plays a crucial role in keeping your engine running smoothly.
February 28, 2024

It's a common question that pops up for car owners during routine maintenance: "Is it really necessary to change the oil filter every time I change the oil?" At first glance, it might seem like a good way to save a few bucks and time, but is it the best practice for your car's health? The oil filter, after all, plays a crucial role in keeping your engine running smoothly. This blog post delves into the importance of the oil filter and what happens when you change your oil but skip the filter.

The Role of the Oil Filter in Your Car

Let's start by understanding what the oil filter does. This unsung hero in your engine bay is responsible for trapping contaminants - like dirt, metallic shavings, and by-products of combustion - that can harm your engine. As oil circulates, it carries these particles, and it’s the filter’s job to clean the oil before it goes back into the engine. A clean filter means cleaner oil, which in turn means a happier, healthier engine. But what happens when the filter gets clogged? Well, it can no longer do its job effectively, which means those nasty little particles might just find their way into the engine, leading to increased wear and tear.

Changing Oil Without Changing the Filter: The Risks

So, what's the big deal about changing the oil but not the filter? Imagine giving your car a fresh drink of oil but forcing it through an old, dirty straw. Not very efficient, right? A used oil filter is less effective at trapping contaminants, meaning the new oil you just put in gets dirty much faster. This can lead to a variety of engine problems, from reduced lubrication to increased wear and even potential engine damage over time. The old filter might also have a reduced flow rate, which can starve the engine of oil, especially at startup. In a nutshell, skipping the filter change can significantly reduce the effectiveness of your fresh oil change.

When Might Skipping the Filter Change Be OK?

Now, are there times when you might get away with not changing the filter? Maybe, in certain cases. For example, if you're changing the oil well before the recommended interval and the filter hasn't been in use for long, it might still be in good shape. However, this is more of an exception than a rule. It's important to remember that regularly skipping the filter change, even in these scenarios, is not advisable. The cost savings are minimal compared to the potential risk and expense of engine repairs down the line.

Best Practices for Oil and Filter Changes

So, what's the best practice? Generally, it's wise to change the oil filter every time you change the oil. This ensures that your engine gets the full benefit of the fresh oil. It's like giving your car a complete refresh rather than just a partial one. Always refer to your vehicle's manufacturer guidelines for the recommended oil and filter change intervals. They've designed these schedules to keep your car in tip-top shape for as long as possible. Regular maintenance might seem like a chore, but it's a small price to pay for a smoothly running engine.